Tire-tread for motor-vehicles.



M. A. KENNEDY.

TIRE TREAD FOR MOTOR VEHICLES.

APPLICATION FILED JAN. 16,1909.

Patented Dec. 20, 1910.

nvvnVmR, m/ vmxf Q @YWW Arm MICHAEL ALEXANDER KENNEDY, OF TORONTO, ONTARIQ, CANADA.

TIRE-TBEAD FOR MOTOR-VEHJEQLES.

I Specification of Letters Patent.

Patented Dec. 20, 1910.

Application filed J'anuary'16, 1909. Serial No. 472,697.

To all whom it may concern:

Be it known that I, MICHAEL ALnxANmm KENNEDY, of the city of Toronto, in the ful Improvements in Tire-Treads for Motor- Vehicles, of which the following is the specification.

My invention relates to improvements in tire treads for motor vehicles, and the object of the invention is to devise a supplemental tread for the SOlld rubber tread, which will permit of a maximum resiliency of the rubber tread and yet prevent it from being sheared, worn or otherwise deleteriously affected and thus serve to prolong the life of the rubber tread.

A further object is to make the protecting tread of such a construction as will be readily adaptable to rubber treads now commonly in use.

My invention consists of a supplemental protectin tread comprising a series of sections pre erably of steel made to fit the form of the tread crosswise, and abutting each other circumferentially, and an encompassing band .or hands for holding the sections together and so connected to them as to allow the sections to conform to the yield of the rubber tread under weight as the wheels rotate, the parts being otherwise constructed and arranged in detail as hereinafter more particularly explained.

Figure 1, is a cross section of a wheel having myjimproved tread. Fig. 2,is an enlarged cross section from the axis outwardly. Fig. 3, is an enlarged section on a plane with the face of the wheel. Fig. 4, is a perpective detail of one of the sections shown in the above fi ures. I" v In the drawings like letters of reference indicate corresponding parts in each figure.

A is a wheel and the rim thereof. I claim nothing in the form of the wheel or rim, and, therefore, I donot detail the particular construction thereof.

My invention is particularly adapted to motor trucks or frelght lorries, although itmay be adapted to other vehicleswith facility.

In Figs. 1, 2, 3 and t I have shown a form of construction which is generally adapted for freight trucks or other heavy vehicles in which there is employed the resilient member or tread comprising a plurality'of parallel rings B, preferably of solid rubber, pass- 9 rotectlng ing circumfereutially around therim of the wheel. Inthis case however, 1t.1s not. in-

tended that the elastic or resilient treadmemcounty of York, 111 the Province of Ontario, I Canada, have invented certain new and useber shall come in direct contact with the ground, their contact being prevented by the use of a circumferential series of transversely extending sections or metallic members extending across the full width of the resilient tread member. These sections C will vary in form according to the shape of the resilient tread member of the wheel. In the case of the form shown in Figs. 1, 2, 3" and 4, the section C comprises a fiat tread portion or face C bridging across the whole width of the resilient member and concaved on its inside to fit over the two elastic treads B. Intermediate of their ends these sections are provided with inwardly projecting retaining lugs C provided with vertical or radially extending slots C through which may be passed the sections D of an encircling or circumferential retaining band, said sections D being connected to each other adjustably by means of turn buckles D. In this form the lateral wings are extended as shown at C to overlap for a considerable port-ion the outside faces of the elastic treads B. The slot 0* in the lugs C serves to allow each member to yield independently of the adjacent members without disturbing or strainin the encircling band which retains them al in place. 7

The construction above described serves a two-fold purpose, namely that of increasing the tractive power of the wheel on the roadway by reason of the independent yielding of the sections and also serves to protect the elastic or resilient rubber treads from injury and wear while preserving the requisite resiliency of the tire.

What I claim as my invention is:

1. A tire for a vehicle wheel embracing in combination a plurality of se arate parallel circumferential resilient trea s, and a series of encompassing metallic sections extending across the full width of the resilient treads to prevent their contact with the ground, the said sections being provided with transverse ed or beaded outer periphery, of a protecting metal tire comprising a series of sections formed with wings correspondingin cross sectional form to the outer periphery of the tire, and each having a connecting bridge revcrsely curved and end fins having slots elongated from inside to outside, and an encompassing band suitably connected together and passing through the several circuinferentially alined slots as and for the purpose specified.

3. In a protecting tire for motor vehicles formed of a series of sections, a section formed with concave outer wings to conform to the form of the tire, a connecting bridge, and end fins slotted. from outside to inside as and for the purpose specified.

4. A protecting tread forvehicle tires comprising a series of metallic sections, each conslstin of a plate formed with a plurality of parallel concave trough-like portions, transverse webs forming the end walls of said section and uniting the trough-like parts together, said end walls being provided with vertical closed slots, and an annular retaining band passing through the slots of the various sections between the trough-like parts of the sections to encircle the tire and hold the sections yieldingly together, substantially as described.

MICHAEL ALEXANDER KENNEDY.

WVitnesses:

B. Born, R. COVAIN. 

